3.12 Create an RSS feed

Add wanted path to router.groovy

is this needed if the path is also in the resource?

    resource(uri: "/feed",
        ofClass: "org.kauriproject.myblog.feed.BlogItemsResource");

Create a BlogItemResource

We'll create a resource class that can get a list of all blog items, this method puts this list into a hashmap. Such a method returns a KauriRepresentation, which on his turn will be mapped to a template in representations.groovy. We create a "listBlogItems" method in this resource class, annotated with a jaxrs path. This method uses JPA to create a list of blogitems.

package org.kauriproject.myblog.feed;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;

import org.kauriproject.myblog.entities.BlogItem;
import org.kauriproject.representation.build.KauriRepresentation;
import org.restlet.resource.Resource;
import org.springframework.orm.jpa.support.JpaDaoSupport;

@Path("/feed")
public class BlogItemsResource extends Resource{
    private JpaDaoSupport jpaDaoSupport;
	
	public void setJpaDaoSupport(JpaDaoSupport jpaDaoSupport) {
		this.jpaDaoSupport = jpaDaoSupport;
	}

	@Path("list")
    @GET
    @Produces("application/xml")
    public KauriRepresentation listBlogItems() {
        Map<String, Object> data = new HashMap<String, Object>();
        // load all blogitems into data
        List<BlogItem> items = jpaDaoSupport.getJpaTemplate().find("select b from items b");
        data.put("items", items);
        
        return new KauriRepresentation("atom", data);
    }
}

Add template to representations.groovy

The resource class creates a Kauri representation which in mapped in representations.groovy:

      when(name: "atom") {
          template(src: "module:/pages/atom.xml")
      }

Create atom template

pages/atom.xml explain